exam Maths Puzzle Numerical Ability

find any rational roots for the equation: x^4 + 3x^3 - x^2 - 9x - 6 = 0

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exam Other Question

simplify

m^x/4*n^3

Divided by

m^2x/3(n^a)^3
Please help! Thanks tutors!

log2(x-1) - log2(x+3)= log2(1/x)